AI (cs2) export to PSD?

macrumors 6502a

Here's a strange buggy thing. After I've created something in AI cs2 with multiple layers and then export that file as a PSD. When opened in PS, it seems that a few of the layers were combined but when i reopen the original back in AI they are separate. Anybody have clues as to why it would combine certain layers and not others during the exporting process?

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